Failed to configure Proactive HA enabled cluster

Products

• VMware vCenter Server

Issue/Introduction

Symptoms:

1. ​​​​​The following error is seen when reconfiguring a cluster.
   Task name Reconfigure cluster
   Target <Cluster Name>
   Status A specified parameter was not correct: InfraUpdateHaConfig.providers
2. Cannot see any Health Update provider listed when trying to configure Proactive HA on a Proactive HA enabled cluster.

Environment

VMware vCenter Server 7.x
VMware vCenter Server 6.x

Cause

This issue will happen when an unmonitored host exists in the cluster with ProactiveHA enabled.

Resolution

To resolve this issue, remove any unmonitored hosts in the cluster. To find the unmonitored host follow the below steps:

1. In a web browser, navigate to https://vCenter_FQDN_or_IP/mob
   Where https://vCenter_FQDN_or_IP/mob is the FQDN of your vCenter Server or its IP address. Log in with your vCenter SSO admin credentials.
2. Click Content.
3. Click group-d1 (Datacenters)
4. Click datacenter-X (<datacenter name>). Choose the target datacenter if there are multiple.
5. Click group-hX (host).
6. In value of the property "childEntity", find the target cluster based on the cluster name in the brackets in the value. The cluster ID will be like "domain-cxx".
7. Go back to the Content page in step 2.
8. Click HealthUpdateManager.
9. Click QueryProviderList and click Invoke Method in the popup window.
   In the popup window, note down the uuid(s) of the provider(s) in the value field.
10. Close the popup window.
11. Click QueryUnmonitoredHosts.
12. In the popup window, enter the provider uuid noted in step 9 into the providerId field. In the cluster field, replace "MOID" with the cluster ID noted in step 6.
13. Click Invoke Method.
14. Repeat steps 12 and 13 for each provider if there are multiple.